#include<stdio.h>
int main ()
{
	int score;
	while(scanf("%d",&score)!=EOF)
	{

		int ge;
		int shi;
		ge=score%10;
		shi=score/10;
		if(0<=score&&score<=19)
		{
			switch(score)
			{
				case 0:
					printf("zero\n");
					break;
				case 1:
					printf("one\n");
					break;
				case 2:
					printf("two\n");
					break;
				case 3:
					printf("three\n");
					break;
				case 4:
					printf("four\n");
					break;
				case 5:
					printf("five\n");
					break;
				case 6:
					printf("six\n");
					break;
				case 7:
					printf("seven\n");
					break;
				case 8:
					printf("eight\n");
					break;
				case 9:
					printf("nine\n");
					break;
				case 10:
					printf("ten\n");
					break;
				case 11:
					printf("eleven\n");
					break;
				case 12:
					printf("twelve\n");
					break;
				case 13:
					printf("thirteen\n");
					break;
				case 14:
					printf("fourteen\n");
					break;
				case 15:
					printf("fifteen\n");
					break;
				case 16:
					printf("sixteen\n");
					break;
				case 17:
					printf("seventeen\n");
					break;
				case 18:
					printf("eighteen\n");
					break;
				case 19:
					printf("nineteen\n");
					break;
				default:
					printf("error1!\n");
					return 0;
			}
		}
		if(20<=score&&score<=99)
		{
			switch(shi)
			{
				case 2:
					printf("twenty");
					break;
				case 3:
					printf("thirty");
					break;
				case 4:
					printf("forty");
					break;
				case 5:
					printf("fifty");
					break;
				case 6:
					printf("sixty");
					break;
				case 7:
					printf("seventy");
					break;
				case 8:
					printf("eighty");
					break;
				case 9:
					printf("ninety");
					break;
				default:
					printf("error2!\n");
					return 0;
			}
			if(ge!=0)
			{
				printf("-");
				switch(ge)
				{
					case 1:
						printf("one\n");
						break;
					case 2:
						printf("two\n");
						break;
					case 3:
						printf("three\n");
						break;
					case 4:
						printf("four\n");
						break;
					case 5:
						printf("five\n");
						break;
					case 6:
						printf("six\n");
						break;
					case 7:
						printf("seven\n");
						break;
					case 8:
						printf("eight\n");
						break;
					case 9:
						printf("nine\n");
						break;
					default:
						printf("error3!\n");
						return 0;
				}
			}
			else
			{
				printf("\n");
			}

		}
	}
	return 0;
}
